Electrical · E-DEBYR

Main Electrical Room Ground Bus Bar Assembly

Materials

Concrete Steel Metal (misc.)

Elements

Entrances Connections / Plates

Connections

Welded Connection

About this detail

An isometric detail features the main ground copper bus bar measuring three-eighths inch thick by two inches high with length as required, mounted via standoff brackets with drilled holes. Grounding conductors include a one-zero American Wire Gauge (3/0) copper wire in a one-inch conduit connecting to the metal underground pipe within five feet of the building entrance per California Electrical Code (CEC) section 250.50. An identical 3/0 conductor in a one-inch conduit connects to the building steel per CEC section 250.50b, alongside another 3/0 conductor running to a concrete-encased electrode or Ufer ground. Additionally, a number 6 wire in a three-quarter-inch conduit connects to each nearest telecom ground bus bar measuring one-half inch thick by two inches wide by six inches long. All electrical connections utilize an exothermic weld process (Cadweld) and bear permanent labels or tags.

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